There had been no trouble transporting the girl, seeing as she was as docile as a sleepy kitty which made her all the cuter in Sakie's eyes. In fact, it was after she made it to the building and went up the flight of stairs that things started getting... weird. Goggling for a moment at the fact there was a twitchy and spastic twintailed girl on the floor with scorch marks on her and another that was sparking, she thought about it and then looked down again while putting two and two together to get something that was definitely not four. 

"Ahh, so she hit herself with her own taser. Poor girl." Nodding to herself, she then put Nadeshiko on the ground and patted her head while she held out a hand to help Kuroko up. "Judgement members shouldn't be so clumsy, tasers are serious business. And you should probably turn off the taser you confiscated from her since that'll run the battery down." Given that she was really worried about Kuroko, she didn't give Misaka more than a glance and thus Sakie didn't realize who she was.